JP2905424B2 - Internal ladder safety device for tank - Google Patents
Internal ladder safety device for tankInfo
- Publication number
- JP2905424B2 JP2905424B2 JP20523495A JP20523495A JP2905424B2 JP 2905424 B2 JP2905424 B2 JP 2905424B2 JP 20523495 A JP20523495 A JP 20523495A JP 20523495 A JP20523495 A JP 20523495A JP 2905424 B2 JP2905424 B2 JP 2905424B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- ladder
- manhole
- safety device
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Ladders (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、タンク用内梯子の
安全装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an inner ladder for a tank.
【0002】[0002]
【従来の技術】周知のように、給水や貯水に用いるタン
ク1には、図3の図示のように、その点検(例えば、年
1回の水質検査)・掃除のため人が出入りするマンホー
ル2がその天井部に設けられており、当該タンク1が大
型化すれば、このマンホール2にはタンク内を昇降する
ための内梯子(タンク外で昇降する梯子は外梯子とい
う)3を吊設している(例えば、実公昭54−2355
1号公報参照)。2. Description of the Related Art As is well known, a tank 1 used for water supply and storage has a manhole 2 through which people enter and leave for inspection (for example, annual water quality inspection) and cleaning as shown in FIG. If the tank 1 becomes large, an inner ladder 3 (a ladder that goes up and down outside the tank is referred to as an outer ladder) 3 is suspended from the manhole 2 when the tank 1 becomes large. (For example, Japanese Utility Model Publication No. 54-2355)
No. 1).
【0003】一方、一般に梯子を使って昇降したり、作
業をすると危険を伴うことから、古くから梯子に関し安
全装置の付設が提唱されている。[0003] On the other hand, it is generally dangerous to go up and down or perform work using a ladder. Therefore, it has been proposed to attach a safety device to a ladder for a long time.
【0004】例えば、実公昭59−470号公報では、
原酒貯蔵用タンクでは、その底面が半球状に膨出してい
るので、タンク内で清掃作業をすると滑りやすい。その
ため、タンクに付設した内梯子に折たたみ式の環体を設
け、この環体を半球状底面にかぶせ、滑り止めにした提
案がなされている。For example, in Japanese Utility Model Publication No. 59-470,
Since the bottom of the tank for brewing sake is bulged in a hemispherical shape, it is easy to slip when the cleaning work is performed in the tank. Therefore, a proposal has been made in which a folding ring is provided on an inner ladder attached to the tank, and the ring is covered on a hemispherical bottom surface to prevent slipping.
【0005】また、実公昭50−20号公報では、1対
の平行な支柱に、直交して等間隔にステップ杆を設けた
梯子を、給水タンクの外梯子として使用するに当り、こ
れらの支柱の上端側を延長して、タンク屋根に沿わして
手摺りを作り、この手摺りを握ってタンク屋根に設けた
マンホールに出入りするようにした提案がなされてい
る。In Japanese Utility Model Publication No. 50-20, a ladder provided with a pair of parallel supports and step rods orthogonally spaced at equal intervals is used as an outer ladder of a water supply tank. It has been proposed to extend the upper end of the rail to make a handrail along the tank roof, and to grasp this handrail to enter and exit the manhole provided on the tank roof.
【0006】また、実公昭54−9009号公報では、
一般の作業用梯子に、腰掛け板と踏板とからなるゴンド
ラ部を固定し、壁等の補修作業の際、ゴンドラ部に乗っ
て安全に作業する提案がなされている。In Japanese Utility Model Publication No. 54-9909,
It has been proposed that a gondola section including a stool and a tread plate is fixed to a general work ladder, and the work on the gondola section is performed safely when repairing a wall or the like.
【0007】[0007]
【発明が解決しようとする課題】ところが、給水等タン
クに用いる合成樹脂製の組立式内梯子には、特に、その
昇降のための安全装置は付設されていない。However, a synthetic resin ladder made of synthetic resin used for a tank for supplying water or the like is not provided with a safety device for elevating the ladder.
【0008】その理由を分析すると、かかる内梯子3
は、図3に示すように、そのトップ部7がマンホール2
の内面に着脱自在に固定され、下端側のボトムパイプ8
がタンクコーナ4に当接・固定されており、しかも、タ
ンク1の大きさによって、支柱5を継ぎ足して調節する
ものであるので、マンホール2の口径や、梯子を組立式
に構成することや、完成されたタンク1にマンホール2
を通って内梯子3を後から組立・付設すること、等の制
約によって、かかる内梯子3には、前記提案のような安
全装置は付設できないことが判明した。When the reason is analyzed, the inner ladder 3
As shown in FIG. 3, the top part 7 has a manhole 2
The bottom pipe 8 is detachably fixed to the inner surface of the bottom pipe.
Are abutted and fixed to the tank corners 4 and are adjusted by adding the columns 5 depending on the size of the tank 1. Therefore, the diameter of the manhole 2 and the ladder can be constructed in an assembling manner. Manhole 2 in completed tank 1
It has been found that due to restrictions such as assembling and attaching the inner ladder 3 afterward, such a safety device as described above cannot be attached to the inner ladder 3.
【0009】そこで本発明者等は、かかる内梯子に好ま
しい可及的簡素な安全装置の開発ができないか、また、
既存の内梯子にもそのままで取付けることができない
か、更に、安全は確保できるか、ということを課題とし
た。Therefore, the present inventors cannot develop a safety device as simple as possible that is preferable for such an inner ladder.
It was an issue whether it could not be installed on existing inner ladders as it is and whether safety could be ensured.
【0010】[0010]
【課題を解決するための手段】かかる課題を解決するた
めに、本発明の要旨を完成されたタンクの天井部に設け
たマンホールに、合成樹脂製内梯子を通して該タンク内
に持込み、そのトップ部をマンホールに着脱自在に取付
けて垂直状とし、該内梯子におけるマンホールに近接し
た位置で、該内梯子の1対の支柱に、該マンホールと略
同じ大きさのワッパ状に弯曲させ、かつ、タンク内に持
込んだ、樹脂弾性をもつ合成樹脂製可撓格子板の両端
を、内梯子板の両横に張出したスティ板を介して、着脱
自在に取付け、該可撓格子板を昇降人が降り始めたとき
の背当材に形成して降下の安全装置にしたことを特徴と
するタンク用内梯子の安全装置とした。In order to solve the problem, the gist of the present invention is taken into a manhole provided on the ceiling of a completed tank through a synthetic resin inner ladder into the tank, and the top portion thereof is provided. Is detachably attached to a manhole to be vertical, and at a position close to the manhole on the inner ladder, a pair of struts of the inner ladder are bent into a wappa shape having substantially the same size as the manhole, and a tank is provided. Both ends of the synthetic resin flexible lattice plate having resin elasticity brought into the inside are detachably attached via staying plates protruding on both sides of the inner ladder plate, and a person lifting and lowering the flexible lattice plate. A safety device for an inner ladder for a tank, characterized in that it is formed on a backrest when the vehicle starts to descend and is used as a safety device for descent.
【0011】[0011]
【発明の実施の形態】本発明を、添付図面に示す、その
実施の形態例にもとづき詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on an embodiment shown in the accompanying drawings.
【0012】図1は本発明の実施の形態例の側面図、図
2は図1の要部斜視図であって、図3で示す従来例と共
通する部分は同一符号を付してる。FIG. 1 is a side view of an embodiment of the present invention, and FIG. 2 is a perspective view of a main part of FIG. 1. In FIG. 1, portions common to those in the conventional example shown in FIG.
【0013】本例に好都合に用いる内梯子3は、約2m
から約6mの範囲で高さの調節ができる組立式内梯子で
あって、支柱、ステップ杆等はPVC樹脂のブロー成形
品である。The inner ladder 3 advantageously used in this example is about 2 m
The inner ladder can be adjusted in height within a range of from about 6 m to about 6 m. The pillars, step rods, etc. are blow molded articles of PVC resin.
【0014】この内梯子3には、約30cm離れた1対
の平行な支柱5,5に、約30cmの等間隔で多数のス
テップ杆6,6…が横設され、この内梯子3の支柱5の
トップ部7はマンホール2の内面に、PC樹脂製等のボ
ルトで着脱自在に取付けられ、ボトルパイプ8はタンク
コーナ4に当接・固定され、梯子全体が垂直に立設され
ている。On the inner ladder 3, a number of step rods 6, 6... Are arranged horizontally at a regular interval of about 30 cm on a pair of parallel pillars 5, 5 about 30 cm apart. The top part 7 of 5 is removably attached to the inner surface of the manhole 2 with bolts made of PC resin or the like, the bottle pipe 8 is abutted and fixed to the tank corner 4, and the entire ladder is vertically erected.
【0015】このような内梯子3は、ビル等の屋上に設
置される給水タンク1に取付けられる、ごく一般的な内
梯子である。The inner ladder 3 is a very common inner ladder attached to the water supply tank 1 installed on the roof of a building or the like.
【0016】ここにおいて、かかる内梯子3に、次のよ
うな安全装置10を着脱自在に取付けている。Here, the following safety device 10 is detachably attached to the inner ladder 3.
【0017】すなわち、その側辺の長さ(高さ)30〜
50cmの4角状の、PVC樹脂製可撓格子板11を、
樹脂弾性を利用してマンホール2の口径と同等か、若干
大きめの、すなわち、直径約60cm〜70cmのワッ
パ状に弯曲させて内梯子3に着脱自在に取付ける。That is, the length (height) of the side is 30 to
A 50 cm square, flexible lattice plate 11 made of PVC resin is
Using the resin elasticity, the manhole 2 is bent to a wappa shape having a diameter equal to or slightly larger than the diameter of the manhole 2, that is, about 60 cm to 70 cm, and is detachably attached to the inner ladder 3.
【0018】この取付け構造は、各種の構造が考えられ
るが、その一つは、可撓格子板11の両側辺に、短冊・
平面視L字状のスティ板14を介して、上、下1対のブ
ラケット12,12…を設け、これらのブラケット12
を支柱5に着脱自在に取付ける。このような取付け構造
にすれば、現場組立ができるため、可撓格子板11を輸
送するには、これを平板状にして輸送でき好都合である
と共に、マンホール2を通して可撓格子板11をタンク
1内へ持込むことができる。勿論、予めワッパ状に弯曲
させておき、取付時、更に拡大弯曲させてもよいし、拡
大させなくてもよい。Various types of mounting structures are conceivable. One of the mounting structures is a rectangular strip on both sides of the flexible grid plate 11.
A pair of upper and lower brackets 12 are provided via an L-shaped stay plate 14 in plan view.
Is detachably attached to the column 5. With such a mounting structure, the on-site assembly can be performed. Therefore, when the flexible grid plate 11 is transported, it can be conveniently transported in the form of a flat plate. Can be brought inside. Of course, it may be curved in advance in a wappa shape, and may be further enlarged or curved at the time of mounting.
【0019】この可撓格子板11の取付け位置は、少な
くとも、内梯子3におけるマンホール2の直下、例え
ば、30〜50cm離れた所に取付け、この可撓格子板
11を昇降人の降り始めたときの背当板ないしガード板
にする。このような背当板を用いると、内梯子3の最も
高い所で、丁度、植林の枝払いのための木登りする人
が、ワッパ状ロープを胴に巻回しているのと同様、手、
足および胴によって昇降人の体のバランスが取り得て、
きわめて安全性が高くなる。しかも、ワッパ状の可撓格
子板11により昇降人にとって、内梯子3におけるステ
ップ杆6の位置が制約され、踏み外すことが少ない。The flexible grid plate 11 is mounted at least immediately below the manhole 2 on the inner ladder 3, for example, at a distance of 30 to 50 cm. Back plate or guard plate. Using such a backplate, the person climbing a tree at the highest point of the inner ladder 3 just for pruning of afforestation is similar to a hand,
The legs and torso can balance the person's body,
Extremely high security. In addition, the position of the step rod 6 on the inner ladder 3 is restricted by the wapper-like flexible grid plate 11 for the person who goes up and down, and the stepping-off step is rarely performed.
【0020】勿論、この可撓格子板11は、タンク1の
大きさによって2〜3段に分けて設けてもよいが、少な
くとも給水タンクの場合、その底面より2mの高さ迄
は、もし、昇降人が落下しても、それ程の支障はないか
ら設ける必要はない。Of course, the flexible grid plate 11 may be provided in two or three stages depending on the size of the tank 1. However, in the case of a water supply tank, at least up to a height of 2 m from the bottom surface, It does not need to be provided because there is not so much trouble even if the elevating person falls.
【0021】次に、取付け構造を詳しく述べる。前記ブ
ラケット12を、断面楕円状の支柱5に巻付け、SUS
製またはPC樹脂製ボルト13でスティ板14と共に縫
付けて支柱5に取付ける。そして、ブラケット12は支
柱5に対し摺動するおそれがあるので、ステップ杆6上
に取付けてこれで支持する。そのため、可撓格子板11
の高さは、ステップ杆6の間隔だけの長さを必要とす
る。Next, the mounting structure will be described in detail. The bracket 12 is wound around the column 5 having an elliptical cross section,
It is sewn together with the stay plate 14 with bolts 13 made of PC or PC resin and attached to the support 5. Since the bracket 12 may slide with respect to the column 5, the bracket 12 is mounted on the step rod 6 and is supported by this. Therefore, the flexible lattice plate 11
Requires a length corresponding to the distance between the step rods 6.
【0022】また、可撓格子板11をブラケット12に
よって直接、支柱5に取付けると、1対の平行な支柱5
の間隔が30cm程度(これはマンホール2径60cm
φから決められる)であるため、可撓格子板11をワッ
パ状に弯曲させて形成した場合、空間が狭くなり、昇降
人に支障をきたすおそれがあるため、長さ約15cmの
短冊・平面視L字状のスティ板14を、内梯子3の両横
に、望ましくは、図2の手前約45°方向に張出して介
在させ、これに可撓格子板11の両端部をそれぞれ設け
ている。When the flexible grid plate 11 is directly attached to the column 5 by the bracket 12, a pair of parallel columns 5 are provided.
Is about 30cm (this is a manhole 2 diameter 60cm)
(determined from φ), if the flexible grid plate 11 is formed by bending it into a wappa-like shape, the space becomes narrow, and there is a risk of hindering people who are going up and down. An L-shaped stay plate 14 is disposed on both sides of the inner ladder 3, preferably in a direction of approximately 45 ° in front of FIG. 2, and the both ends of the flexible lattice plate 11 are provided on the both sides.
【0023】したがって、このスティ板14の長さを変
えることにより、また、スティ板14を折曲する角度に
より、ワッパ状空間の調節や、支柱5の間隔に対する調
節ができる。Therefore, by changing the length of the stay plate 14 and the angle at which the stay plate 14 is bent, adjustment of the wappa-like space and adjustment of the interval between the columns 5 can be performed.
【0024】以上のような内梯子3に取付けた安全装置
10によれば、タンク点検・掃除のために昇降すると
き、例えば、給水タンク1の場合、年1回の水質検査の
ため、タンク1内に降りるとき、昇降人の安全が確保で
きる。According to the safety device 10 attached to the inner ladder 3 as described above, when ascending and descending for tank inspection and cleaning, for example, in the case of the water supply tank 1, the tank 1 is used for water quality inspection once a year. When descending inside, the safety of climbers can be ensured.
【0025】なお、本発明の安全装置10の可撓材は、
必ずしも図示のものに限らず、強度を有し、かつ、ワッ
パ状に弯曲可能の合成樹脂製の可撓材であれば、例え
ば、単なる可撓板や帯体やパイプであってもよい。The flexible material of the safety device 10 of the present invention is as follows.
The material is not limited to the one shown in the drawings, and may be a simple flexible plate, a band, or a pipe, for example, as long as it is a flexible material made of synthetic resin that has strength and can be bent in a wappa shape.
【0026】[0026]
【発明の効果】本発明によれば、マンホールを降り始
めたときの内梯子の両支柱に、マンホールと略同じ大き
さのワッパ状に弯曲した合成樹脂製可撓格子板を取付け
たので、この可撓格子板が背当材となって、昇降人の
手、足および胴の背当により体のバランスをとりなが
ら、つまり、姿勢を整えながら、殊に垂直状の内梯子を
昇降することができ、安全性を確保でき、また、マンホ
ールと略同じ大きさのワッパ状であるため、昇降人にと
って、マンホール直下のステップ杆の位置が制約され、
踏み外すことが少ない。According to the present invention, since a flexible lattice plate made of synthetic resin, which is approximately the same size as the manhole, is attached to both struts of the inner ladder when the manhole is started to descend, and thus the flexible lattice plate is formed. The flexible lattice plate is used as a backing material, and it is possible to raise and lower the body, especially the vertical inner ladder, while keeping the body balanced by the backs of the hands, feet and torso of the person. Yes, safety can be ensured, and since it is a wappa shape of approximately the same size as the manhole, the position of the step rod directly under the manhole is restricted for people who go up and down,
It is rare to step off.
【0027】可撓格子板とし、かつ、着脱自在とした
ので、組立現場への輸送および、タンク内への持込みが
好都合となる。Since the flexible grid plate is made detachable, it can be conveniently transported to the assembly site and brought into the tank.
【0028】合成樹脂製可撓格子板を、単にワッパ状
に弯曲しただけであるので、きわめて安価となり、既設
の内梯子にも付設でき、内梯子にとって好都合となる。Since the synthetic resin flexible lattice plate is simply curved in a wappa shape, it is extremely inexpensive and can be attached to an existing inner ladder, which is convenient for the inner ladder.
【図1】本発明の実施の形態例の側面図である。FIG. 1 is a side view of an embodiment of the present invention.
【図2】図1の要部斜視図である。FIG. 2 is a perspective view of a main part of FIG.
【図3】従来例である。FIG. 3 is a conventional example.
1…タンク、2…マンホール、3…内梯子、7…トップ
部、11…可撓格子板DESCRIPTION OF SYMBOLS 1 ... Tank, 2 ... Manhole, 3 ... Inner ladder, 7 ... Top part, 11 ... Flexible lattice plate
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) E06C 7/18 E03B 11/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) E06C 7/18 E03B 11/00
Claims (1)
ホールに、合成樹脂製内梯子を通して該タンク内に持込
み、そのトップ部をマンホールに着脱自在に取付けて垂
直状とし、該内梯子におけるマンホールに近接した位置
で、該内梯子の1対の支柱に、該マンホールと略同じ大
きさのワッパ状に弯曲させ、かつ、タンク内に持込ん
だ、樹脂弾性をもつ合成樹脂製可撓格子板の両端を、内
梯子板の両横に張出したスティ板を介して、着脱自在に
取付け、該可撓格子板を昇降人が降り始めたときの背当
材に形成して降下の安全装置にしたことを特徴とするタ
ンク用内梯子の安全装置。1. A manhole provided on the ceiling of a completed tank and taken into the tank through an inner ladder made of synthetic resin.
Look, vertical the top part of that is removably attached to the manhole
Position straight and close to the manhole on the inner ladder
Then, a pair of struts of the inner ladder are bent into a wappa shape having substantially the same size as the manhole and brought into the tank.
I, the ends of the synthetic resin flexible lattice plate having a resin elastic, inner
The flexible lattice plate is formed as a backrest when a person starts climbing down to form a safety device for descent by attaching detachably via staying plates protruding on both sides of the ladder plate. Internal ladder safety device for tanks.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20523495A JP2905424B2 (en) | 1995-07-18 | 1995-07-18 | Internal ladder safety device for tank |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20523495A JP2905424B2 (en) | 1995-07-18 | 1995-07-18 | Internal ladder safety device for tank |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0932443A JPH0932443A (en) | 1997-02-04 |
JP2905424B2 true JP2905424B2 (en) | 1999-06-14 |
Family
ID=16503634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20523495A Expired - Fee Related JP2905424B2 (en) | 1995-07-18 | 1995-07-18 | Internal ladder safety device for tank |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2905424B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014075689A1 (en) * | 2012-11-16 | 2014-05-22 | Nor-Safe.Com Aps | Safety installation |
-
1995
- 1995-07-18 JP JP20523495A patent/JP2905424B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0932443A (en) | 1997-02-04 |
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